change the field
Allow a json_handler to return a Response object
Merge pull request #235 from singingwolfboy/json-handler-can-return-response

Allow a json_handler to return a Response object
Merge pull request #234 from edx/danielli/pyfs

We use fields to generate keys. This fix makes this work in edx-platform, where these are not strings. 

By abstraction, we should generally not rely on this being "stringy," but in this case, we went through this with Cale, and it seems like the least of all evils. Otherwise, we'd replicate a lot of code.
Correct declaration for scope_key.
Merge pull request #237 from edx/pmitros/fix-scope-key-encoding

Correct declaration for scope_key.
Change from AGPL to Apache 2.0